Sandpapering-machine.



PATENTBD FEB. 14, 1905.

H. W. RUGG.

SANDPAPERING MACHINE.

APPLICATION FILED JAN. 26. 1904.

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PATENTED FEB. 14, 1905.

H. W. RUGG.

SANDPAPBRING MACHINE.

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Ufa/46 5566 @aQM N0. 782,798. 7 PATENTED FEB. 14, 1905.

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SANDPAPERING MACHINE.

APPLICATION FILED JAN. 26, 1904- 3 BHEETS-BHEBT 3.

UNITED STATES Patented February 14, 1905.

PATENT OEEIcE.

HARRISON RUGG, OF STERLING, MASSACHUSETTS, ASSIGNOR TO THE RUGG CHAIRCOMPANY, OF STERLING, MASSACHUSETTS.

SANDPAPERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 782,798, dated February14, 1905. Application filed January 26, 1904. Serial No. 190,663.

To ctZZ 1071 0771! it may concern.-

Be it known that I, HARRISON W. Rose, of Sterling, in the county ofWorcester and State 'of Massachusetts, have invented certain new anduseful Improvements in Sandpapering- Machines; andIdo hereby declarethatthefollowing is a full, clear, and exact description of the same.

This invention relates to abrading tools and implements, andparticularly to a classthereunder known as sandpapering-machines.

An object of the invention is to provide novel means for feedinga'curved board or object through the machine whereby the rolls carryingsandpaper are brought into contact with the surfaces of the said curvedboard and serve to finish the said surface through the agency ofmechanism to be hereinafter more fully set forth.

Furthermore, an object of the invention is to provide sanding orabrading surfaces of clifferent degrees of coarseness, so that one setof rolls will act to remove the coarser grain and finish and the finerabrading-surface will tend to finish the said work-surface ready for theapplication of paint or other coatings.

. Furthermore, an object of the invention is to provide novel means foreffecting a unitary motion of the several elements of the combinationwhereby the feeding and abrading mechanism is operated from a singlesource of power.

Finally, an object of the invention is to provide a sandpapering-machineof the character noted which will possess advantagesin points ofsimplicity, efficiency, and durability, proving at the same timecomparatively inexpensive to produce and maintain.

With the foregoing and other objects in view the invention consists inthe details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and specifically claimed.

In describing the invention in detail refer ence will be had to theaccompanying drawings, forming part of this specification, wherein likecharacters denote corresponding parts throughout the several views, inwhich Figure 1 is a view in side elevation, showing a machine forabrading materials and sur- 5 0 faces embodying the invention. Fig. 2 isan end view thereof. Fig. 3 is a vertical longitudinal sectional viewtaken approximately centrally of the machine or on the line3 3 of Fig.2. 5 5

In the drawings, 1 indicates the frame, having suitable bearings for theshafts of the feeding-rolls 2 3, which areduplicated at each end of themachine, the said rolls being on the same horizontal plane. Each roll 2and 3 has a coacting idle roll 2' 3, driven frictionally by means of thematerial operated upon passing between them and rolls 2 3. These idlerolls 2 3 are adjusted by means of the springarms 4 and thumb-screws 4',so that they may 5 bear with more or less pressure on their com panionrolls, the feeding-rolls being rotated in the direction of the arrowsshown in Fig. 3. The shafts of the rolls 2 3 are journaled in bearingsformed in the free ends of 7 the spring-arms A 4, the opposite ends ofthe arms being suitably secured to the frame of the machine. Thethumb-screws 4L 4 are provided with enlargements, against which thespring-arms continually abut by their own re' silience, the movement ofthe screw in one direction or the other operating to adjust the arms andthe rolls carried thereby toward or from the feed-rolls 2 3. Each of thefeedingrolls 2 3 is positively driven through the meso dium of thepinions 5 and 5 on the shafts 10 and 13, which pinions mesh with thegearwheels 7 and 7 on shaft of rolls 2 and 3 for the purpose of rotatingsaid feed rolls, as stated. 5

Abrading-rolls 8, 9, 12, and 13 are mounted on shafts 10 and 11, andsimilar rolls l2 and 13 are mounted on shafts 1O, l1, l3, and 13",respectively, the only difference being that the first-mentioned rolls 8and 9 carry abrading material relatively coarser than that carried bythe other rolls 12 and 13 in order that the rough finish of the wood maybe first removed and that the second rolls, which carry the finerabrading material, may serve to smooth and polish the surface of theboard or the material passed between them. On the shafts 11 and 13" ofthe lower rolls are secured the pulleys 14:, over which the power-belt15 is driven for the purpose 'of rotating the shafts 11 and 13". Each ofthe shafts 11 and 13" carry gear-wheels 23 and 24, which mesh with thegear-wheels 25 and 26, secured to the shaft 13 and 10, respectively, sothat the gear-wheels of the shafts or feeding-rolls and the gear-wheelson the abrading-rolls inter-mesh in order that they may all be driven inunison. Another idle feeding-roll 27 is mounted in the frame in the pathof travel of the material to be operated upon and is designed for thepurpose of supporting and aiding the feeding of the said material. Thesaid shaft is positively driven through the medium of the gear-wheel 28,meshing with the pinions 5 and 5' on the shafts 10 and 13.

It will be seen from the foregoing that when the power-belt is moved inthe direction of the arrows the pulleys 14 14 rotate the shafts or rollsand communicate motion through the gearing of the feeding shafts orrolls to the supporting-roll in the center of the frame. In practice themachinery would be rotated in the direction shown in the arrows, and thematerial here designated as a curved chairback is fed into the rolls onthe right-hand side of the frame, the said curved chair-back beingdirected between the coarse abrading surfaces of the abrading-rolls 8and 9, the said chair-back being then supported centrally on the shaftor roll 27 in order to prevent buckling of the material, said materialbeing then passed between the abrading-surfaces of the otherabrading-rolls and passed out between the feeding-rolls on the oppositeend of the frame.

Having fully described the invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an abrading-machine, the combination with an abrading-roll, of aplurality of suitablysupported resilient arms having free ends, shaftsjournaled in the free ends of the arms,

rolls carried by the shafts and means engaging the resilient members orarms intermediate their ends for effecting an adjustment of the rolls ineither direction.

2. In an abrading-machine, the combination with an abrading-roll, ofresilient arms secured to the machine at one of their ends, a shaftjournaled in the free ends of the arms, a feed-roll on the shaft,set-screws passing through the resilient arms at points intermediatetheir ends, the screws engaging the machine to adjust the rolls ineither direction and enlargements on the screws against which the armsautomatically abut and by means ofwhich they are moved in theiradjustment.

3. An abrading-machine comprising a suitable frame, feed-rolls locatedat either end of the frame and a plurality of sets of abradingrollsjournaled in the frame, the primary set of abrading-rolls adapted tocarry coarser abrading material than does the final set ofabrading-rolls, the Work passing from the preliminary to the final setof abrading-rolls.

4. An abrading-machine comprising a suitable frame, a plurality of setsof abrading-roll shafts journaled thereon, the shafts each carryingabrading-rolls and large and small gearwheels, feed-roll shaftsjournaled in the frame, gears carried by the feed-roll shafts andadapted to mesh with the small gears on the abrading-roll shafts, thelarge gears of each set of abrading-rolls adapted to intermesh, anidle-roll shaft journaled in the frame, a gearwheel thereon intermeshingwith the small gear-wheels .on the abrading-roll shafts, a driving asingle means and means connecting one memberof each set of abrading-rollshafts with the driving means to solely actuate the entire machine.

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